Improvement in lifting-jacks



NAPETERS, PNOTO-LITHDGRAPHER, WASHINGTON, D. C,

"dilated gaat@ @strut @Wire ALONZO M. WATERS, OF OUYAHOGA FALLS, ASSIGNOR TO HIM-SELF HENRY E. MARINER, OF AKRON, OHIO.`

Letters Patent N 106,639, dated August 23, 1870.

IMPROVEMENT IN LIFTING-JACKS.

The 'Schedule referred to in these Lettera Patent and making part of the same or carriages to facilitate the l'elnoval of their wheels;v

and I do llel'eby declare that the following is a full, clear, and exact description of the saule, reference bcing had to the accompanying drawing forming a part of this specification, in whichg Figure 1 represents a perspective view of my improved liftillg-jack Figure 2 represents a side view of my improved lifting-jack; and

Figure 3 represents a tfront view of the sanle.

To enable those skilled ill the art to wllicll my in vention belongs to make and use the same, I will proceed to descl'ibe it more in detail.

Tile nature o f luy im ention consists,

Firstin the combination of the upright standard and foot-block, in a lifting-jack, of swivel and rocking joints, as hereafter described.`

Second, in the combination with the upright stock or standard, of an extension metal slide and holdingpill, as hereafter set fort-h.

Third, in the combination with the standard and slide, of a peculiarly constructed lever..

Fourth, ill thel combination with the level', of a peculiarly constructed rocker-piece, as hereafter dcscribed.

Fifth, ill a lifting-jack, the part-s of which are constructed alld combined together for operation, substantially as hereinattcr set forth.

In the drawing- Tile pal't marked 'A is the foot-block.

B, the nlaill stoi k or standard, which is secured to the toot-block A b v a metallic joint piece, forlned of a dat picco of metal, a., fastened througll its center by a swivel bolt, e,to the foot-block A, and having its sides turned up at right angles to foi'ul ears, b, between whicll are secured the lower elld ofthe main `stock B, by a pin or bolt, d, which passes through the ears and stock h'onl side to side.

By this construction a double joint is formed, as the main stock can be rocked back and forth on the bolt d, or it can be turned around upon the swivelholt e.

1t will be seen, by this arrangement, the upper end of the stock is tree. to move ol rock back and forth when the lever D is operated for raising the wagon, while the swivel-joint, in combination with the rocking'joil'lt, permits the bed or foot-picco to stand h'l'nl, alld, at thc same time, admits of its being turned to conform to the unevcnness of the surface upon which it stands,

' 'lhe top part IB' of the main stock is formed separatefrom'the lower part, and is joined thereto by a metallic extension slide, C, the top piece l heilig tirnlly secured ill the. top of said slide, which latter extends dowll thestock B, and is formed to embrace three sides thereof, as shown ill the drawing.

Holes, e, are formed through t-lle stock l alld slide C, ill which to insert the holding-piaf, aud, by changing the pill to the different holes, the height of the jack can he adjusted. Y i

['he lifting lever D is pivoted by the screw or bolt E to the side of the top piece B', the boit being ar- `ranged near the lower ol' rear'side of the level', as

'shown ill tig. 2, the level' being made somewhat broader at its fulcrulu for that purpose. The uppel'ipart of the level' D is provided with a metallic guard-strap, g, which passes around its end, and is secnrcdlirlnlyto the wooden part of said lever l by screws, nails, or rivets. rlhe use of this strap g is to strengthen and to prevent excessive wearing ct' the parts. Y

' Tile lever D is also furnished at itsextremity with a seniicircular rocker-piece, F, having its upper part formed to tit the axle of the wagon or carriage.

The corners h of the rocker-piece are made somewhat higher than its center, thereby forming notches upon its upper edge, which prevents the axle from slipping therefrom wilile it is being raised.

The rocker-piece F is pivoted to the lever D by a screw or bolt, a, which passes through the lowel' part of the rocker somewhat to the rear of its center, therebybalancing it in such a lilanncr that the weight ofthe axle, or other object raised, will not be liable to overturn it toward the' rear, as thc lever is pressed down and the rocker swings upward.

Tile pivot-bolt lu is arranged ill lille with the top or front side of the lever D, while the fulcrum-holt E is arranged atthe lower or rear side of said lever. i l

Now, it will be observed, that by arranging the parts ill this manner, the celltel' of gravity is carried past the vertical center of the fulcrunl-pin E as the lever D is pressed down consequently, the weight of the object raised holds the level' in position when it has passed down far enough to bring the stop-pill It' in the side of the lever D ill contact with the` upright standard of the jack. l v

It may sometimes be desirable touse the lever with the semicireular rocker-piece turned back, or even witllout the rocker-piece; and, for that purpose the metallic strap g is serrated or roughened `at the upper side of the level', as indicated at m, to prevent the axle or other object li'om slipping tllcl'eii'om while heilig raised.

Those accustomed to the use of carriage o1'- liftingjacks will readily appreciate the value and importance ing piece C, and its holding-pin f, lever D, and ro'ckof' my invention. v er-piece F, said parts being arranged for joint opera# Having described my ixiiprovements in lifting-jacks, tion, as herein shown und seb forth. What I claim therein as new and of my invention, A. M. NVATERS.

vund desire tu s: cure by Lett-ers Patent, is'- A lifting-jack composed of the lfoot-block A, and Witnesses: the .stock ll pivoted and hinged to the same, in com- GEO. P. ASHMAN, bination with the standard B', metallic extension slid- H. E. MARIN-ER. 

